Chapter 17 Case studies of soil quality in the Canadian Prairies: Long-term field experiments

1997 ◽  
pp. 351-397 ◽  
Author(s):  
C.A. Campbell ◽  
H.H. Janzen ◽  
N.G. Juma
Keyword(s):  
Case Studies ◽  
Soil Quality ◽  
Field Experiments ◽  
Canadian Prairies ◽  
Term Field

scholarly journals Long-term field experiments in Germany: classification and spatial representation

SOIL ◽  
2020 ◽  
Vol 6 (2) ◽  
pp. 579-596
Author(s):  
Meike Grosse ◽  
Wilfried Hierold ◽  
Marlen C. Ahlborn ◽  
Hans-Peter Piepho ◽  
Katharina Helming
Keyword(s):  
Soil Quality ◽  
Spatial Representation ◽  
Field Experiments ◽  
Arable Land ◽  
Clay Content ◽  
Access Point ◽  
Research Data ◽  
Very High ◽  
Term Field

Abstract. The collective analysis of long-term field experiments (LTFEs), here defined as agricultural experiments with a minimum duration of 20 years and research in the context of sustainable soil use and yield, can be used for detecting changes in soil properties and yield such as those induced by climate change. However, information about existing LTFEs is scattered, and the research data are not easily accessible. In this study, meta-information on LTFEs in Germany is compiled and their spatial representation is analyzed. The study is conducted within the framework of the BonaRes project, which, inter alia, has established a central access point for LTFE information and research data. A total of 205 LTFEs which fit to the definition above are identified. Of these, 140 LTFEs are ongoing. The land use in 168 LTFEs is arable field crops, in 34 trials grassland, in 2 trials vegetables and in 1 trial pomiculture. Field crop LTFEs are categorized into fertilization (n=158), tillage (n=38) and crop rotation (n=32; multiple nominations possible) experiments, while all grassland experiments (n=34) deal with fertilization. The spatial representation is analyzed according to the climatic water balance of the growing season (1 May to 31 October) (CWBg), the Müncheberg Soil Quality Rating (MSQR) and clay content. The results show that, in general, the LTFEs well represent the area shares of both the CWBg and the MSQR classes. Eighty-nine percent of the arable land and 65 % of the grassland in Germany are covered by the three driest CWBg classes, hosting 89 % and 71 % of the arable and grassland LTFEs, respectively. LTFEs cover all six MSQR classes but with a bias towards the high and very high soil quality classes. LTFEs on arable land are present in all clay content classes according to the European Soil Data Centre (ESDAC) but with a bias towards the clay content class 4. Grassland LTFEs show a bias towards the clay content classes 5, 6 and 7, while well representing the other clay content classes, except clay content class 3, where grassland LTFEs are completely missing. The results confirm the very high potential of LTFE data for spatially differentiated analyses and modeling. However, reuse is restricted by the difficult access to LTFE research data. The common database is an important step in overcoming this restriction.

scholarly journals Long-term Field Experiments in Germany: Classification and spatial Representation

2020 ◽  
Author(s):  
Meike Grosse ◽  
Wilfried Hierold ◽  
Marlen C. Ahlborn ◽  
Katharina Helming
Keyword(s):  
Soil Quality ◽  
Spatial Representation ◽  
Field Experiments ◽  
Arable Land ◽  
Access Point ◽  
Research Data ◽  
Meta Information ◽  
Very High ◽  
Term Field

Abstract. The collective analysis of long-term field experiments (LTFE) can be used for detecting changes in soil properties and yield such as induced by climate change. However, information about existing LTFEs is scattered, and the research data are not easily accessible. In this study, meta-information on LTFEs in Germany is compiled and their spatial representation is analysed. The study is conducted within the framework of the BonaRes project, which, inter alia, has established a central access point for LTFE information and research data. A total of 205 LTFEs is identified with a minimum duration of twenty years and research in the context of soil and yield. Of these, 140 LTFEs are ongoing. LTFEs are categorized into fertilization, tillage, and crop rotation experiments. The spatial representation is analysed according to the climatic water balance (CWB) and the Müncheberger Soil Quality Rating (MSQR). The results show that, in general, the LTFEs well represent the area shares of both the CWB and the MSQR classes. 89 % of the arable land and 65 % of the grassland in Germany is covered by the three driest CWB classes, hosting 89 % and 71 % of the arable and grassland LTFE, respectively. LTFE cover all six MSQR classes, however with a bias towards the high and very high soil quality classes. The results confirm the very high potential of LTFE data for spatially differentiated analyses and modelling. However, reuse is restricted by the difficult access to LTFE research data. The common database is an important step in overcoming this restriction.

Critical plant phosphorus for winter wheat assessed from long-term field experiments

2021 ◽  
Vol 126 ◽  
pp. 126263
Author(s):  
Mario Fontana ◽  
Gilles Bélanger ◽  
Juliane Hirte ◽  
Noura Ziadi ◽  
Saïd Elfouki ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Field Experiments ◽  
Term Field

Long-term field experiments of the world

2003 ◽  
Vol 49 (5) ◽  
pp. 465-483 ◽  
Author(s):  
Katalin Debreczeni ◽  
Martin Körschens
Keyword(s):  
Field Experiments ◽  
The World ◽  
Term Field

Soil test phosphorus as affected by phosphorus budgets in two long-term field experiments in Germany

2018 ◽  
Vol 218 ◽  
pp. 158-170 ◽  
Author(s):  
Theresa Zicker ◽  
Sabine von Tucher ◽  
Mareike Kavka ◽  
Bettina Eichler-Löbermann
Keyword(s):  
Field Experiments ◽  
Soil Test ◽  
Phosphorus Budgets ◽  
Soil Test Phosphorus ◽  
Term Field
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